For a fresh Moodle 3.5 site:

In the Message section, CONFIRM the five media icons on the right of the message toolbar have icons in the following order, and with the following mouseover text:
1 - Image icon: "Insert or edit image".
2 - File-video icon: "Insert or edit an audio/video file".
3 - Microphone icon: "Record audio".
4 - Video icon: "Record video".
5 - Files icon: "Manage files".

Also CONFIRM clicking each of the icons opens the expected tool (eg clicking the video icon open the record video tool).

Navigate to [yoursite]/admin/settings.php?section=editorsettingsatto.

Scroll down to Toolbar config and CONFIRM the line in the config, as well as the Default text below the textarea show the files row as follows:files = image, media, recordrtc, managefiles

Update the site theme to Clean, and repeat steps 1-6. Clean does not support FontAwesome icons, so will display the equivalent SVG/PNG format icons (which should look the same, but be grey instead of black).

For upgrading a site:

Set up

Create a fresh site from stable master.

Log in as admin.

Navigate to [yoursite]/admin/settings.php?section=editorsettingsatto.

Scroll down to Toolbar config. If the files row is not as follows, update it to match:
files = image, media, managefiles, recordrtc

Click Save changes at the bottom of the page.

Create a new course (c1).

Open the course and click Announcements.

Click Add a new topic.

In the Message section, check the five media icons on the right of the message toolbar match the default stable master format:

Testing

Upgrade the site using integration master.

Follow the testing procedure steps 1-6 from "For a fresh Moodle 3.5 site" above. This ensures the upgrade process is updating media icons in the same way they will appear for a brand new site.

For a fresh Moodle 3.5 site:
Set up
Create a fresh site from integration master , using Boost theme.
Log in as admin.
Create a new course (c1).
Testing
Open the course and click Announcements .
Click Add a new topic .
In the Message section, CONFIRM the five media icons on the right of the message toolbar have icons in the following order, and with the following mouseover text:
1 - Image icon: "Insert or edit image".
2 - File-video icon: "Insert or edit an audio/video file".
3 - Microphone icon: "Record audio".
4 - Video icon: "Record video".
5 - Files icon: "Manage files".
Also CONFIRM clicking each of the icons opens the expected tool (eg clicking the video icon open the record video tool).
Navigate to [yoursite] /admin/settings.php?section=editorsettingsatto.
Scroll down to Toolbar config and CONFIRM the line in the config, as well as the Default text below the textarea show the files row as follows:
files = image, media, recordrtc, managefiles
Update the site theme to Clean, and repeat steps 1-6. Clean does not support FontAwesome icons, so will display the equivalent SVG/PNG format icons (which should look the same, but be grey instead of black).
For upgrading a site:
Set up
Create a fresh site from stable master .
Log in as admin.
Navigate to [yoursite] /admin/settings.php?section=editorsettingsatto.
Scroll down to Toolbar config . If the files row is not as follows, update it to match:
files = image, media, managefiles, recordrtc
Click Save changes at the bottom of the page.
Create a new course (c1).
Open the course and click Announcements .
Click Add a new topic .
In the Message section, check the five media icons on the right of the message toolbar match the default stable master format:
Testing
Upgrade the site using integration master .
Follow the testing procedure steps 1-6 from "For a fresh Moodle 3.5 site" above. This ensures the upgrade process is updating media icons in the same way they will appear for a brand new site.